I searched for a topic like this, but I found nothing. I want some viking BLACK metal recommendations (Not melodic viking metal like Ensiferum or Finntroll) similar to bands like old Borknagar, old Enslaved, Windir and Ulver. Thanks.

I'd check early Sólstafir, Manegarm (with more folky-stuff, but excellent), Thyrfing, Kampfar, Falkenbach (old ones better), Myrkgrav or even October Falls (has a similar vibe though not "viking")... and Moonsorrow is a must check ! Better start with the last one (or the first) since it's the most "black" sounding.

Thyrfing has their moments if you are looking for something more modern, but really Bathory is where it is at my friend. Listen to "A Fine Day To Die." Odin's trusty 6-legged stead trampling over the Norselands....Epic.